Shower drain



FIG. 1 is a top view of a shower drain showing my new design;

FIG. 2 is a perspective view;

FIG. 3 is an exploded view;

FIG. 4 is an exploded view; and,

FIG. 5 is a side view.

The broken lines illustrate surrounding environment and portions of the design that form no part of the claimed design. 

CLAIM The ornamental design for a shower drain, as shown and described. 